Some recorded music uses stereo rather extensively: The two sound channels don’t sound much alike at all. You don’t notice this quite as much on speakers as you do on headphones.
Apparently, when I listen to such music on headphones, if I wear them the “right” way the music sounds slightly choppy and disorienting – but if I flip the headphones, so the right channel goes to my left ear and vice-versa, the music suddenly sounds completely natural. Apparently ear dominance is a real and easily detected thing.
Creepy.
Yonatan Zunger’s Blog 
If you have good speakers placed sufficiently far apart – as in, more than 8′ or so – the stereo seperation is much more noticable. Ideally, you aim them towards one particular sweet spot instead of letting them diffuse in parallel.
Interesting. I am mostly right-side dominant, but usually am left-eye dominant.
Maybe that’s why I am so goddamn clumsy.